Telegraph-repeater.



No. 733,909. I P'ATENTED JULY 14, 1903.: P. w. JONES.

TELEGRAPH RBPBATBR v nrmonmx rum) APR. 17, 1903. N0 MODEL.

UNITED STATES Patented July 14, 1903.

FRANCIS WV. JONES, OF NEW YORK, N. Y.

TELEG RAPH-REPEATER.

SPECIFICATION forming part of Letters Patent No. 733,909, dated July 14, 1903.

Application filed April 17, 1903. Serial No. 153.033- No model.)

To aZZ whom it may concern:

Be it known that I, FRANCIS WILEY JONES, a citizen of the United States, and a resident of the city of New York, in the county and State of New York, have made certain new and useful Improvements in Telegraph-Repeaters, of which the following is a specification.

This invention relates torepeaters for telegraplrcircuits which reproduce current-impulses in one circuit as they occur in the other circuit, operating automatically in either direction.

The object of this invention is to provide a simpler and therefore better repeater than any now known.

I-Ieretofore and priorto my invention it was sought to economize in the number of separate electromagnets employed. This required one magnet to perform two or more functions. I provide a magnet for each separate function to be performed. By employing a common and well-known form of instrument I avoid the expense of a special pattern or special form of instrument.

The accompanying drawingillustrates my invention.

As the equipment for each circuit in an automatic telegraph-repeater is duplicated, it will be necessary to describe the instruments for one circuit and their connections only.

There is a main switchboard containing the spring-jack 0. Its contact 2 is connected to the main wire to. Its movable contact 13 is connected to the main-line generator g. A spring-jack plugf, composed of two insulated contacts 12 and 14, enters the jack 0. Contact 12 is connected to the circuit-terminal 11.

The coil of the transmitter 10 operates the bar 9. There is a switch '6, having fixed contact 31 and movable contact 30, operated by the electromagnet 24. The holding-coil 20, the sounder-coil 21, the transmitter-coil 10, and the switch-coil 24 are in circuit in series with a local generator points 40 and 41 of the relay m are included in this local circuit. This local circuit extends from the local generator or by wire 48 to the fixed contact 41, through the movable contact 40 to wire 42, thence via coil 20, wire 43, coil 21, wire 44, coil 10, wire 45, coil 24,wire 47 to earth or return-conductor. There is a shunt-circuit around each holding-magnet 20. This shunt-circuit is made and broken by a switch operated by the electromagnet in the local circuit controlled by the relay in the opposite main circuitthat is to say, the relay min the circuit w has a holding-coil 20 in the local circuit controlled by the break-points 40 and 41. This coil 20 is short-circuited by the conductors and 61, which are connected to the switch-contacts and 71, controlled by electromagnet j in the local circuit, operated by relay 0 in the main line e; or, considering the operation in the reverse direction ,the holding-coil 20 of the relay 0 is in the local circuit controlled by relay 0, but a shunt-circuit composed of the conductors 50 and 51 is connected to the switch-contacts 30 and 31 and is controlled by the electromagnet 24 in'the local circuit controlled by the relay m in the main line w. When circuit in main line to is broken, armature 40 of relay m falls back. Simultaneously armature-bar 30 of electromagnetic switch vl falls back, breaking the short-circuit through conductors 50 and 51. Immediately following this the spring-contact 8 of transmitter t, controlled by electromagnet 10 in the local circuit of relay m,

breaks the main circuit of line e, but the armature-bar of relay 0 cannot fall back, as it The repeatingis held by the extra magnet-coil 20 of relay 0,

which is included in the local circuit, controlled by relay 0, at the instant the shunt 50 51 is broken. The success of the operation is dependent upon breaking the shunt at 30 31 before the main circuit e is .broken at s 8. The employment of the spring in the latter case and the adjustment of the instrument .2 to respond more quickly than the instrument t facilitate the successful operation. By making the several magnets separate and distinct I am enabled to adjust each one independently to perform its specific Work.

What I claim, and desire to secure by Letters Patent, is

1. In a repeaterthe combination of two main circuits; two relays, one for each circuit; a holdingcoil for each relay-arm, a spring-contact point in each main circuit, a shunt-circuit around each holding-coil, a switch for each shunt-circuit, a local circuit for each relay, each circuit containing three separate and distinct electromagnetic coils, the first coil to hold the relay-arm, the second coil to 0perate the spring-contact in the second main circuit, and the third coil to operate the other relay.

FRANCIS W. JONES. lVitnesses:

J. R. FRITH, J r., A. M. DONLEVY. 

